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During muscular contraction, which of th...

During muscular contraction, which of the following events occur?
H-zone disappears
(ii) A-band widens
(iii) I-band reduces in width
(iv) Width of A-is unaffected
(v) M-line and Z-lne come closer
(v) M-line and Z-line come closer

A

(i), (iii), (iv) and (v)

B

(i) , (ii) and (v)

C

(ii) , (iv) and (v)

D

(i), (ii) and (iii)

Text Solution

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The correct Answer is:
A
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During muscular contraction, which of the following events occur? (i) H-zone disappears (ii) A-band widens (iii) I-band reduces in width (iv) Width of A-is unaffected (v) M-line and Z-lne come closer (v) M-line and Z-line come closer

Events occurring in muscular contraction (i) H-zone disappears (ii) A band widens (iii) I-band reduces in width Width of A band is unaffected (v)M-line and Z-line come closer.

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During muscle contraction (a) A band remains of length same (b) O band increases (c) H zone and M line disappear (d) I band increases € Membrane of Krause comes closer (f) Sarcomere lengthens

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If z - axis is the internuclear axis, which of the following combinations are not allowed ? (i) 2s and 2s (ii) 1s and 2p_(x) (iii) 2pP_(y) and 2p_(y) (iv) 2p_(x) and 2p_(z) (v) 2p_(z) and 2p_(z) (vi) 2s and 2p_(z) (vii) 2p_(x) and 2p_(y) .

MODERN PUBLICATION-LOCOMOTION AND MOVEMENT-OBJECTIVE TYPE QUESTIONS (A. MULTIPLE CHOICE QUESTIONS)
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